The petition was created by a group called the “Kool Kids Klan,” and it had garnered a total of two student signatures.

Then on Monday night, a Twitter user with the handle “kkkforreal” threatened two schools in Anne Arundel County in a tweet stating that they would be “blowing up Annapolis High school tomorrow.” The same user also tweeted that “black [n-word] better run.” One of the tweets directed to Arundel High School also referenced the same Kool Kids Klan that created and circulated the racist petition.

A white supremacist petition that circulated at a Maryland high school on Friday described African Americans as a “scourge,” said they “invented” rape, stealing and basketball, and spoke of “the supreme White race.” School officials immediately denounced the document and began an investigation.

The petition, labeled Kool Kids Klan — its three K’s underlined in a thinly veiled reference to the Ku Klux Klan — has led school leaders to pledge “the strongest possible actions” against any students involved.

George Arlotto, schools superintendent in Anne Arundel County, condemned the document in a letter to parents, saying it was shared during lunch Friday at Arundel High School, in Gambrills, Md. Several students are believed to have been involved, he said, and at least two students signed the petition.

“I am shocked, dismayed, and quite frankly angered that such a piece of material would be produced, much less appear in one of our schools,” he wrote. “It is unconscionable to me how anyone could believe this material is anything but horrifying, and it has absolutely no place in our schools or school system.”

As others voiced similar reactions, Anne Arundel police on Monday afternoon began investigating what they called an “indirect threat” against the school of 2,089 students, made in a tweet. Police said the threat appeared related to the Friday incident.

It was then revealed who was behind the Twitter threats as well as the racist petition. WJZ reported:

The Anne Arundel County Police Department has charged a 14-year-old girl with a juvenile citation for sending a threatening tweet related to Arundel High School.

Police began their investigation after Arundel High School officials told them about a suspicious Twitter account.

The account, named @KoolkidsKlanKkk, reportedly sent out a tweet that read, “We’re planning to attack tomorrow”.

Police worked with Twitter, and were able to identify the person who created the account and sent out the threatening tweet.

That person has been identified as a 14-year-old African American female who attends Arundel High School.

Authorities interviewed the girl while she was with her parents, and police say she admitted to creating the Twitter account and sending the threatening tweet.

She was charged with a juvenile citation for disruption of school activities and released to her parents.

“It makes me really upset. I can’t believe that students would write something like that,” said parent Michelle Fitzurka.

“I kind of felt unsafe at the school and a little hurt,” said Taylor Nash, a freshman at Arundel High.

The school district said all the students involved in that incident were disciplined, but the students were not identified, and to complicate an already tense situation, Wednesday night hundreds showed up for a meeting at the school, but some parents still had questions.

“That is not good enough. What’s going to happen with the students that are still here?”said parent Tamara Hannah.